The Collaborative International Dictionary
Siphonostomatous
Siphonostomatous \Si`pho*no*stom"a*tous\, a. (Zo["o]l.)
Having the front edge of the aperture of the shell prolonged in the shape of a channel for the protection of the siphon; -- said of certain gastropods.
Pertaining to the Siphonostomata.
Wiktionary
siphonostomatous
a. 1 (context zoology English) Having the front edge of the aperture of the shell lengthened in the shape of a channel for the protection of the siphon; said of certain gastropods. 2 (context zoology English) Pertaining to the Siphonostomata.